Cut-off for fluid-pressure motors.



- J. H. CHAMP.

GUT-0H1 PoR FLUID PRESSURE MOTORS.

' APPLICATION FILED JULY 19, 1909K 'y 956,287. Patented Apr. 26, 1910l 2 SHEETS-SHEET 1.

J. H. CHAMP.

CUT-OPF FOR FLUID PRESSURE MOTORS.

APPLICATION FILED `TULY 19, 1909.

956,287'D Patented Apr.26, 1910.

regulating valves .rosrrH H. cHAMlAY'oF CLEvELANn, oHIo.

Speciication of Letters Patent.

CUT-OFF FOR FLUID-PRESSURE MOTORS.

i v.PatentedApr. 26, 1910.

Application filed-July 19, 1909. -Serial No. 508,28`8."l

'Tofell whom it may concern:

Ie it known .that I, .JOSEPH H.y CHA-MP, a cltlzen ofthe. United States, and -a resident of. Cleveland, county of Cuyahoga, and State `of Ohio, have invented anew and useful Im- ,provenientiA in. Gut-Offs. vfor Fluid-Pressure Motors, of winch |the lfollowing Vis a specification., the prlnclple: of the invention being herein. explained andthe best mode in which I have contemplated applying that principle so as to distinguish. it from other inventions. The present invention relates ingeneral to for .automatically controlling the flow of. the energizing fluid to a pump, or other engine, a specific application, for example, being the. control .of theflow of 1v vxtter to a water motor voperating a water 'lhe objectl of. thet invention is the provision of. .av simple r.and compact device kfor this. purpose, and one that will not easily get outof order.

flfothe accomplishmentof theseand yrelated objects, .said invention, then, .consists of the means hereinafter 4:fully described and parti.cularlypointed out in the claims. .1

The. annexed. drawing.and thefollowing descriptionset forth in :detail certainl mechanism embodying theA invention, such' disclosed meansconstituting, however, but one of various mechanical forms .in which the principle of the invention may be used.'A

In said annexed draWing:-Fi ure lis a vertical central Lsection-,of acut 0%, or regulatingvalve,A embodying .my several improvements; Fig.v 2.is-a similar sectional view. taken at right angles to that of Fig'.- l;

Flg. 3 shows a 'valve` detail. as in Fig. 2, but Fig. bis a more or less diagrammatic -in character,- representing' -the.valve as-:it appears .ivheninstalled inconnection with the pump and reservoir; while Fig..5 shows ajmod-iiied construction of `valve adapting it for use i-n a vacuumsystem. v

`.A s has been indicated, one eldof use for my. improved cutoifo" valve, is thecontrolling of the supply of water, as from a city main, to-,a `lwater motor A, and in the illustrative .installation .of Fig. 4, such motor is shown as pumping other liquid, as for example, Water from a Gistern into a reservoir B.. -Thelatter may either be elevated above the. pumping station, or else it may be a closed reservoir, and the water introduced therein against the increasing pressure o't' inlet .and outlet yjoined the .appropriate-connections c2 c3 A(Fig. Il) leading from'the water .ton valve. c

differential piston C2 reciprocab theconlined volume of air. In either event :1n-.increasing hydrostatic head-or equivalent pressure is produced which vis utilized in effecting operation of the controlling valve, lor, cutoff.- The latter more or less water tothe motor, and if necessary'cuts -off the supply thereto entirely, thus stoppingthe'same. u

Referringv then to the Adetailed construction of such control valve *when thus employed in pressure service, -it will be seen to comprise a lcasing C provided with alined openings c c to which are main (not shown); and to -thepump A respectively.

.'lransverselydisposed with respect to the line of said openings, and lying above and below the same respectively, is a valve chamresponsively admits ber c4, and a'piston chamber ci", the former being adapted to-accommodate letgolouble pisand terminating above inan enlarged chamber c7. for the accommodation of .a secondarypiston C', or equivalent fluid pressure actuated-device,I thatis connected with said valve, so as to raise and lower the same in its chamber.

held under a. variable closing its'outer end, serves to retain said piston and valve in their lower-most position despite any pressure exerted thereagainst by the water .entering throughthe inlet opening c. ofthe casing., A connection 01, however, leading from the reservoir to theunder side of said piston permitsthe latter to be raised by; they pressure, whether; Huid' or liquid,ftransmitted through such connection .whenever a predetermined height is reached inthe reservoir, as will be readilyunderstood. 4 A. .passage e c having .connection with said auxiliary valve chamber ctthrough a portI of? leads therefrom to the outer end ofthe main piston'chamber c5. Such latter chamberis formed of two different diameters to-acco1nmodate the respective ortions of a y held therein with its smaller face directed inwardly, while its larger lface is directed outwardly. Such smaller face bears a valve cl2 that is adapted to seat against a= port cl3 formed in the casing between the inlet and outlet openings, and thereby to control connection between such openings. A by-pass c14 is provided, moreover, in the casing, such by-pass leading from the portion of Normally -a spring cs, tension by a nut 09 inthem'ain piston chamber intermediate between thetwo parts of said differential piston to a waste connection 015 provided in the casing laterally of the auxiliary valve ch-amber 04. Such auxiliary valve chamber is likewise connected with such waste connection through an orilice c, which orilice, together with the port o connecting the valve chamber with a passage c, are so disposed that in the lower osition of said auxiliary valve the passage in question is put into communication with the waste connection; while 1n the upper osition ot said valve, such communication 1s broken ott, the port c being now 1ocated below the valve, and the passage 011 thus put into communication with the inlet side of the casing proper. y

In view of the foregoinof description of the structure of my improved cut-oil` or regulating valve, its mode ot' operation should be readily apparent. In the normal or. open position of the valve illustrated in Figs.. 1 and 2, the pressure against the secondary piston C that actuates the auxiliary valve o, is insufficient to raise the latter against the spring. The passage c leading from the under side of the differential piston C2, ac-

\ cordingly, is 1n communication with the waste 015 and the pressure of the water supplied to the casing through the inlet opening, is accordingly effective to depress said diiierentialpistonl and the valve carried by the upper face thereof, so as to leave a free and unobstructed passage for the water through the cut-off to the motor or pump A. When now the water in the reservoir supplied by said pump reaches a predetermined height, piston C and thereby the auxiliary valve, will be raised, the new position of the latter being that indicated in Fig. 3, in which position the communication between ports c1 and c is closed so that the liquid supplied to the casing through the inlet opening is now admitted to the under side of the dierential piston C2, while at the same time communication between such side and the waste is cut oi. Such under face being of greater area than the upper face, the effect of such admission of thewater to the dierential piston casing, will be to raise the piston and thereby the valve, so as to cut oli the flow of the water through the valve to the pump, the piston and valve being maintained in such position so long as the pressure against the under face of the auxil iary-valve-actuating piston C is not reduced.

The simplicity of construction and fewness of operative parts, thus seen to characterize my improved cut-0E, render the same unlikely to get out of order, no attention whatever being ordinarily required while in use. It need scarcely be added that while I have thus illustrated my improved cut-off valve as employed in controlling the supply of water to a water motor, it is equally adapted for use in similarly Con- LVpiston chamber;

In the modiied construction of Fig. -5, theJ sectional plane of which corresponds with that of Fig. 1, a diaphra valve al in a chamber D is substituted tgolil the secondary piston C in chamber 07, as actuating means for auxiliary valve c". As before a spring cl serves to normally retain said diaphragm and valve in their respective inner positions, but instead of a single adjusting nut 0, a plug 032 adjustably held in a stuliing box d3 is utilized. Finally in lieu of a pressure line connected with chamber D on the under side of the diaphragm, a suction line is connected with the outer side of said chamber, so that a predetermined suction will serve to actuate the diaphragm and draw the valve 0 in its outer position. The manner in which such modified construction of the cut-olf is installed should be evident and hence is not illustrated, it being understood, of course, that the water supplied through the cutoff operates a vacuum pump instead of a force pump. It need merely be stated in conclusion that the term, ated, as herein employed, re ers to elther positive or negative pressures, compared with normal, z'. e. atmospheric pressure.

Other modes of appJ ying the, rinciple of my invention may e employe instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed. v.

I therefore particularly point out and distinctl claim as my invention z- 1. Ih a device of the character described, the combination of a casing having inlet and outlet openings; transversely disposed piston and valve chambers in said casing and communicating with the outlet and inlet sides of said casing, respectively; a passage with a port opening into said valve chamber and leading thence to the outer end of said a dierential piston in such piston chamber, the smaller face of such piston being directed inwardly; a valve borne by such face and adapted to control connectlon between the inlet and outlet openings; an auxiliary valve in said valve chamber, adapted in one position to open the port of such passage to the casing interior and in another position to open such port to waste; and Huid-pressure-actuated means for operatin said auxiliary valve.

2. In a device o the character described, the combination of a casing having substantially alined inlet and outlet openings;

luidressure-actul.transversely disposed piston and valve chambers 1n sa1d casing, one on each side of the line of said openings and communicating with the outlet1 and inlet sides of said casing, respective' a assage with a ort opening into salyd valige chamber and ligading thence to the outer end of said piston chamber; a diferential piston in said piston chamber, the smaller face of said piston being directed inwardly; a valve borne by such face and adapted to" control connection between such inlet and outlet openings; an

auxlliary valve in said valve chamber;

adapted in one position to open the port of said passage to the casing interior and in another position to open said port to waste; and iiuid-pressure-actuated means for operating said auxiliary valve. v

3. In a device of the character described, the combination of a casing having substantially alined inlet and outlet openings,- transversely disposed piston and valve chambers in said casing, one on each side of the line of said openings and communicating with the outlet and inlet sides of said casing, respectively, said casing being formed with a port alined with said chambers; a passage, with a port opening into said valve chamber, and leading thence to the outer end of said piston chamber; a differential piston in said piston chamber, the smaller` face of said piston being directed nwardl a valve borne by such face and adapted to he pressed against the port in said casing and thereby control connection between such inlet and outlet openings; an auxiliary valve in said valve chamber adapted in one position to open the port of said passage to the casing interior andin another position to open said port to waste; iuid-pressure-actuated means for operating said auxiliary valve; and a passage leading to Waste from between the two faces of said piston.

Signed by me this 16th day of July,y 1909.

JOSEPH H. CHAMP. Attested by- F. L. HINDs, E. H. VoGnLPoHL. 

